diff options
Diffstat (limited to 'drivers/media/video/pwc/pwc-if.c')
| -rw-r--r-- | drivers/media/video/pwc/pwc-if.c | 171 |
1 files changed, 16 insertions, 155 deletions
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c index ec4e2ef54e65..de7c7ba99ef4 100644 --- a/drivers/media/video/pwc/pwc-if.c +++ b/drivers/media/video/pwc/pwc-if.c @@ -136,19 +136,13 @@ static int leds[2] = { 100, 0 }; /***/ -static int pwc_video_close(struct file *file); -static ssize_t pwc_video_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos); -static unsigned int pwc_video_poll(struct file *file, poll_table *wait); -static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma); - static const struct v4l2_file_operations pwc_fops = { .owner = THIS_MODULE, .open = v4l2_fh_open, - .release = pwc_video_close, - .read = pwc_video_read, - .poll = pwc_video_poll, - .mmap = pwc_video_mmap, + .release = vb2_fop_release, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .mmap = vb2_fop_mmap, .unlocked_ioctl = video_ioctl2, }; static struct video_device pwc_template = { @@ -562,17 +556,6 @@ static const char *pwc_sensor_type_to_string(unsigned int sensor_type) /***************************************************************************/ /* Video4Linux functions */ -int pwc_test_n_set_capt_file(struct pwc_device *pdev, struct file *file) -{ - if (pdev->capt_file != NULL && - pdev->capt_file != file) - return -EBUSY; - - pdev->capt_file = file; - - return 0; -} - static void pwc_video_release(struct v4l2_device *v) { struct pwc_device *pdev = container_of(v, struct pwc_device, v4l2_dev); @@ -583,113 +566,6 @@ static void pwc_video_release(struct v4l2_device *v) kfree(pdev); } -static int pwc_video_close(struct file *file) -{ - struct pwc_device *pdev = video_drvdata(file); - - /* - * If we're still streaming vb2_queue_release will call stream_stop - * so we must take both the v4l2_lock and the vb_queue_lock. - */ - if (mutex_lock_interruptible(&pdev->v4l2_lock)) - return -ERESTARTSYS; - if (mutex_lock_interruptible(&pdev->vb_queue_lock)) { - mutex_unlock(&pdev->v4l2_lock); - return -ERESTARTSYS; - } - - if (pdev->capt_file == file) { - vb2_queue_release(&pdev->vb_queue); - pdev->capt_file = NULL; - } - - mutex_unlock(&pdev->vb_queue_lock); - mutex_unlock(&pdev->v4l2_lock); - - return v4l2_fh_release(file); -} - -static ssize_t pwc_video_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct pwc_device *pdev = video_drvdata(file); - int lock_v4l2 = 0; - ssize_t ret; - - if (mutex_lock_interruptible(&pdev->vb_queue_lock)) - return -ERESTARTSYS; - - ret = pwc_test_n_set_capt_file(pdev, file); - if (ret) - goto out; - - /* stream_start will get called so we must take the v4l2_lock */ - if (pdev->vb_queue.fileio == NULL) - lock_v4l2 = 1; - - /* Use try_lock, since we're taking the locks in the *wrong* order! */ - if (lock_v4l2 && !mutex_trylock(&pdev->v4l2_lock)) { - ret = -ERESTARTSYS; - goto out; - } - ret = vb2_read(&pdev->vb_queue, buf, count, ppos, - file->f_flags & O_NONBLOCK); - if (lock_v4l2) - mutex_unlock(&pdev->v4l2_lock); -out: - mutex_unlock(&pdev->vb_queue_lock); - return ret; -} - -static unsigned int pwc_video_poll(struct file *file, poll_table *wait) -{ - struct pwc_device *pdev = video_drvdata(file); - struct vb2_queue *q = &pdev->vb_queue; - unsigned long req_events = poll_requested_events(wait); - unsigned int ret = POLL_ERR; - int lock_v4l2 = 0; - - if (mutex_lock_interruptible(&pdev->vb_queue_lock)) - return POLL_ERR; - - /* Will this start fileio and thus call start_stream? */ - if ((req_events & (POLLIN | POLLRDNORM)) && - q->num_buffers == 0 && !q->streaming && q->fileio == NULL) { - if (pwc_test_n_set_capt_file(pdev, file)) - goto out; - lock_v4l2 = 1; - } - - /* Use try_lock, since we're taking the locks in the *wrong* order! */ - if (lock_v4l2 && !mutex_trylock(&pdev->v4l2_lock)) - goto out; - ret = vb2_poll(&pdev->vb_queue, file, wait); - if (lock_v4l2) - mutex_unlock(&pdev->v4l2_lock); - -out: - if (!pdev->udev) - ret |= POLLHUP; - mutex_unlock(&pdev->vb_queue_lock); - return ret; -} - -static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma) -{ - struct pwc_device *pdev = video_drvdata(file); - int ret; - - if (mutex_lock_interruptible(&pdev->vb_queue_lock)) - return -ERESTARTSYS; - - ret = pwc_test_n_set_capt_file(pdev, file); - if (ret == 0) - ret = vb2_mmap(&pdev->vb_queue, vma); - - mutex_unlock(&pdev->vb_queue_lock); - return ret; -} - /***************************************************************************/ /* Videobuf2 operations */ @@ -782,6 +658,8 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count) if (!pdev->udev) return -ENODEV; + if (mutex_lock_interruptible(&pdev->v4l2_lock)) + return -ERESTARTSYS; /* Turn on camera and set LEDS on */ pwc_camera_power(pdev, 1); pwc_set_leds(pdev, leds[0], leds[1]); @@ -794,6 +672,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count) /* And cleanup any queued bufs!! */ pwc_cleanup_queued_bufs(pdev); } + mutex_unlock(&pdev->v4l2_lock); return r; } @@ -802,6 +681,8 @@ static int stop_streaming(struct vb2_queue *vq) { struct pwc_device *pdev = vb2_get_drv_priv(vq); + if (mutex_lock_interruptible(&pdev->v4l2_lock)) + return -ERESTARTSYS; if (pdev->udev) { pwc_set_leds(pdev, 0, 0); pwc_camera_power(pdev, 0); @@ -809,22 +690,11 @@ static int stop_streaming(struct vb2_queue *vq) } pwc_cleanup_queued_bufs(pdev); + mutex_unlock(&pdev->v4l2_lock); return 0; } -static void wait_prepare(struct vb2_queue *vq) -{ - struct pwc_device *pdev = vb2_get_drv_priv(vq); - mutex_unlock(&pdev->vb_queue_lock); -} - -static void wait_finish(struct vb2_queue *vq) -{ - struct pwc_device *pdev = vb2_get_drv_priv(vq); - mutex_lock(&pdev->vb_queue_lock); -} - static struct vb2_ops pwc_vb_queue_ops = { .queue_setup = queue_setup, .buf_init = buffer_init, @@ -834,8 +704,8 @@ static struct vb2_ops pwc_vb_queue_ops = { .buf_queue = buffer_queue, .start_streaming = start_streaming, .stop_streaming = stop_streaming, - .wait_prepare = wait_prepare, - .wait_finish = wait_finish, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, }; /***************************************************************************/ @@ -1136,6 +1006,8 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id /* Init video_device structure */ memcpy(&pdev->vdev, &pwc_template, sizeof(pwc_template)); strcpy(pdev->vdev.name, name); + pdev->vdev.queue = &pdev->vb_queue; + pdev->vdev.queue->lock = &pdev->vb_queue_lock; set_bit(V4L2_FL_USE_FH_PRIO, &pdev->vdev.flags); video_set_drvdata(&pdev->vdev, pdev); @@ -1190,15 +1062,6 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id pdev->vdev.v4l2_dev = &pdev->v4l2_dev; pdev->vdev.lock = &pdev->v4l2_lock; - /* - * Don't take v4l2_lock for these ioctls. This improves latency if - * v4l2_lock is taken for a long time, e.g. when changing a control - * value, and a new frame is ready to be dequeued. - */ - v4l2_disable_ioctl_locking(&pdev->vdev, VIDIOC_DQBUF); - v4l2_disable_ioctl_locking(&pdev->vdev, VIDIOC_QBUF); - v4l2_disable_ioctl_locking(&pdev->vdev, VIDIOC_QUERYBUF); - rc = video_register_device(&pdev->vdev, VFL_TYPE_GRABBER, -1); if (rc < 0) { PWC_ERROR("Failed to register as video device (%d).\n", rc); @@ -1253,20 +1116,18 @@ static void usb_pwc_disconnect(struct usb_interface *intf) struct v4l2_device *v = usb_get_intfdata(intf); struct pwc_device *pdev = container_of(v, struct pwc_device, v4l2_dev); - mutex_lock(&pdev->v4l2_lock); - mutex_lock(&pdev->vb_queue_lock); + mutex_lock(&pdev->v4l2_lock); /* No need to keep the urbs around after disconnection */ if (pdev->vb_queue.streaming) pwc_isoc_cleanup(pdev); pdev->udev = NULL; pwc_cleanup_queued_bufs(pdev); - mutex_unlock(&pdev->vb_queue_lock); v4l2_device_disconnect(&pdev->v4l2_dev); video_unregister_device(&pdev->vdev); - mutex_unlock(&pdev->v4l2_lock); + mutex_unlock(pdev->vb_queue.lock); #ifdef CONFIG_USB_PWC_INPUT_EVDEV if (pdev->button_dev) |